After the car key is broken, you can go to the 4S shop directly to replace it. 4S stores have a backup of your key, just copy it from the computer and test it into the new key.
The use of remote control keys should pay attention to the following points;
1, in fact, the remote control key is also a very fragile electronic component, must not let it water or close to the high temperature area. If you fall into the water, remove the lid of the key and dry it with a hair dryer.
2, do not put the key with other electronic products, or with magnets. They interfere with each other easily cause chip damage. It may also increase the error rate of the chip.
3, spare keys can not be put in the car, to put it in a dry area of the home.